- Enrollment
- 451
- Students per teacher
- 20.5:1
- Resource Index
- 33/100
Elementary school (grades K-5) · San Carlos, CA
Arroyo
Federal NCES profile for Arroyo, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063429013998
👥 S:T ratio 11
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 91
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arroyo earns 33/100 on the Resource Investment Index, with class sizes near the California median.
- #3 of 7
- elementary schools in San Carlos · Resource Index
- 33
- Resource Index · Typical
- 22.3:1
- students per teacher
- 7.9%
- free-lunch eligible
Arroyo has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Arroyo ranks #3 of 7 elementary schools in San Carlos, CA.
School address
District: San Carlos Elementary · California
NCES ID 063429013998 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+10 students YoY
Arroyo held near 287 students from 2022-23 to 2023-24 (+10 headcount).
Teacher FTE lost 13.6 → 12.1 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+10 students YoY 063429013998 · San Carlos, CA Elementary · SMALL · TRAD
290 enr · 22.3:1 · 7.9% lunch · RII 33
Nearest enrollment peer: Tierra Linda Middle (451 students)
Arroyo held near 287 students from 2022-23 to 2023-24 (+10 headcount). Teacher FTE lost 13.6 → 12.1 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Arroyo in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Tierra Linda M
Tierra Linda Middle
451 students
- Central Middle
Central Middle
443 students
- Brittan Acres
Brittan Acres Elementary
411 students
- Arundel Elemen
Arundel Elementary
388 students
- Mariposa
Mariposa
322 students
- This school
Arroyo
290 students
What this shows Arroyo reports 290 students on the CCD universe file.
How Arroyo compares
Arroyo held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 22.3:1 | ▲ 4% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 7.9% | ▼ 86% | 55.5% | 51.7% |
| Enrollment | 290 | top 75% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22.3:1
Leaner classes than 10% of US schools, heavier class loads than most.
290
Bigger than 31% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
7.9%
free-lunch eligible
- 86% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
22.3:1
students per teacher
- 4% above state mean
Top 56% in California - lower ratio than 44% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
3.8%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$18,583
per pupil, district-wide
- below California avg of $18,665
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.5 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 1 out-of-school
Suspension rate: 0.7 per 100 students. Combined in-school and out-of-school rate: 1.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 53.4%
Asian 17.6%
Two or More 16.9%
Hispanic or Latino 10.7%
African American 1.0%
American Indian / Alaska Native 0.3%
Largest group: White at 53.4% of enrollment.
Student-body diversity index 64.4/100
Simpson diversity index - at 64.4, Arroyo is more mixed than the California school average of 46.0.
Programs
District finance for San Carlos Elementary reports $18,583 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Arroyo Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Tierra Linda Middle | Larger | Similar economic need | Lower S:T ratio |
| Central Middle | Larger | Similar economic need | Similar S:T ratio |
| Brittan Acres Elementary | Larger | Similar economic need | Higher S:T ratio |
| Arundel Elementary | Larger | Similar economic need | Similar S:T ratio |
| Mariposa | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Arroyo's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 443
- Students per teacher
- 22.1:1
- Resource Index
- 30/100
- Enrollment
- 411
- Students per teacher
- 24.2:1
- Resource Index
- 32/100
- Enrollment
- 388
- Students per teacher
- 21.6:1
- Resource Index
- 32/100
- Enrollment
- 322
- Students per teacher
- 21.5:1
- Resource Index
- 34/100
Similar elementary schools in San Carlos
6 comparable elementary schools (grades K-5) serving the same city.
Brittan Acres Elementary
Standard public school
411 students 24.2:1 students per teacher
Arundel Elementary
Standard public school
388 students 21.6:1 students per teacher
San Carlos Charter Learning Center
Standard public school
377 students 20.9:1 students per teacher
Mariposa
Standard public school
322 students 21.5:1 students per teacher
Heather Elementary
Standard public school
320 students 18.8:1 students per teacher
White Oaks Elementary
Standard public school
250 students 22.7:1 students per teacher
Nationwide elementary schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~290 students)
Frequently asked questions about Arroyo
How many students attend Arroyo?
Arroyo has 290 students enrolled. It is an elementary school in San Carlos, CA. CCD year-over-year: 277 (2022-23) → 287 (2023-24), nearly flat (+10).
What is the student-teacher ratio at Arroyo?
The student-teacher ratio at Arroyo is 22.3:1, which is 4% higher than the California average of 21.5:1 and 42% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Arroyo?
7.9% of students at Arroyo are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Arroyo?
The largest demographic group at Arroyo is White at 53.4% of enrollment, in San Carlos, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.4/100.
What is the Resource Investment Index for Arroyo?
Arroyo has a Resource Investment Index of 33/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Arroyo rank among elementary schools in San Carlos?
By Resource Investment Index, Arroyo ranks #3 of 7 elementary schools in San Carlos, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in San Carlos on the city page.
What other schools are in San Carlos Elementary?
Besides Arroyo, San Carlos Elementary also operates Tierra Linda Middle (451 students), Central Middle (443 students), and Brittan Acres Elementary (411 students). See the San Carlos Elementary district page for the complete list.